Remote controlling via bluetooth from phone

[Bob Alexander <bob@ngi.it>]

I have seen a guy giving a presentation in Openoffice Impress on XP and 
controlling PgUp, PgDown via his Nokia bluetooth capable cellphone.

What are the components that are involved (if there are) to do this 
under Debian ?

Of course I know about the necessity of the kernel supporting my BT 
devices but on top of that ?

TIA,
Bob